CVE-2024-42350Network attack vector

Authorization bypass via third-party key-table substitution

Published Aug 5, 2024 · Updated Aug 5, 2024

Public-key confusion in Biscuit Rust 4 allows remote authenticated users to bypass a delegated authorization check with a forged request. ThirdPartyBlockRequest accepts a caller-supplied publicKeys table, letting the holder substitute a key so generated Datalog trusts the holder's keypair instead of the intended authority. Exploitation requires a legitimate token and a third-party authority that generates blocks with trusted annotations; the forged token bypasses the requirement for another authority's block.

CVSS severity3.0
Low
EPSS probability0.29%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Public-key confusion in Biscuit Rust 4 allows remote authenticated users to bypass a delegated authorization check with a forged request. ThirdPartyBlockRequest accepts a caller-supplied publicKeys table, letting the holder substitute a key so generated Datalog trusts the holder's keypair instead of the intended authority. Exploitation requires a legitimate token and a third-party authority that generates blocks with trusted annotations; the forged token bypasses the requirement for another authority's block.

The record

CVE
CVE-2024-42350
Published
Aug 5, 2024
Updated
Aug 5, 2024
Vendor
Eclipse Biscuit
Product
Biscuit Rust
Classifications
CWE-668, T1550.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 5, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Eclipse Biscuit · Biscuit Rustversion=< 4

Published CVSS scores

3.0GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere
T1550.001Use Alternate Authentication Material: Application Access Token

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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